Sheet Pan Cajun-Spiced Snapper with Roasted Sweet Potatoes

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

This dish features tender snapper fillets seasoned with a bold Cajun spice blend, roasted alongside sweet potatoes for a flavorful, one-pan meal. This seafood-inspired sheet pan (gluten free) ready in about 45 minutes pairs fillets (6 oz each) snapper fillets, olive oil, Cajun seasoning for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 30 min Serves 4 Seafood cuisine 320 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat your oven to 425°F. In a large bowl, toss 2 medium sweet potatoes cubed into 1-inch pieces with 2 tbsp olive oil, 1 tsp salt, and 1/2 tsp black pepper until evenly coated. Spread them out on a large rimmed baking sheet.
  2. Step 2: Roast the sweet potatoes in the oven for 15 minutes until they begin to soften and brown at the edges.
  3. Step 3: Meanwhile, in a small bowl, combine 2 tbsp Cajun seasoning, 1 tsp garlic powder, and 1 tsp smoked paprika. Pat 4 snapper fillets dry and rub each fillet on both sides with 1 tbsp olive oil and the spice mixture.
  4. Step 4: Remove the baking sheet from the oven after 15 minutes and carefully place the seasoned snapper fillets on top of the sweet potatoes. Return the sheet to the oven and roast for an additional 12-15 minutes until the snapper flakes easily with a fork and sweet potatoes are tender.
  5. Step 5: Serve the snapper and sweet potatoes hot, garnished with 2 tbsp chopped fresh parsley and 4 lemon wedges for squeezing over the fish.

Equipment for this recipe

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Frequently asked questions

How long does Sheet Pan Cajun-Spiced Snapper with Roasted Sweet Potatoes take to make?

Total time is about 45 minutes (15 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Sheet Pan Cajun-Spiced Snapper with Roasted Sweet Potatoes?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep olive oil from drying out.

Can I substitute ingredients in Sheet Pan Cajun-Spiced Snapper with Roasted Sweet Potatoes?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Sheet Pan Cajun-Spiced Snapper with Roasted Sweet Potatoes for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Sheet Pan Cajun-Spiced Snapper with Roasted Sweet Potatoes gluten free?

Yes — this recipe is tagged gluten free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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